Lock-nut.



H. W. JENNER.

. LOCK NUT.

APPLICATION FILED NOV. 3, 19M.

I 1,15%197 Patented Aug. 17, 1915.

HORACE W. .l'ENNER, 0F SUMNER, ILLINOIS.

LOCK-NUT.

Specification of Letters Patent.

Patented Aug. 17, 1915.

Application filed lIovember 3, 1914. Serial No. 870,114.

Lock-Nuts, of which the followingis a specification, reference being hadtherein to the accompanying drawing.

This invention relates to a lock nut and has for its principal objectthe production of a simple and efiicient means for positively lockingthe nuts in a set position after the same have been threaded upon thebolt.

Another object of this invention is the production of a lock nut havinga key wh ch is so formed as to be carried between the nuts and to beturned for forcing the nuts apart and binding the same 1n engagementwith the threads of the bolt for positively locking the nuts thereon.

-\Vith these and other objects in view, this invention consists ofcertain novel combinations, constructions, and arrangements of parts aswillbe hereinafter fully described and claimed.

In the accompanying drawing :Figure 1 is a 'side elevation of theimprovedlock nut showing the same carried by a support.

Fig. 2 is a fragmentary sectional view of the device showing the same inan assembled position. Fig. 3 is art enlarged sectional view of the locknut showing the key priorto being turned to a locked position. Fig. 4 isan elevation of the inner face ofone of the nuts. Fig. 5 is a plan. viewof the lock nut showing a slightly modified form of the invention.

Referring to the accompanying drawing by numerals l designates thebolthaving -the usual head 2 and the threaded portion 3. This threadedportion 3, it will be seen,

' is formed to provide right and left hand threads which intersect eachother so as to allow nuts having right, and left hand threaded portionsto be threaded thereon.

Each nut 4 is provided with an opening 5 having internal threads (itThese threads 6 may be either right or left hand threads but in order toform an operative device it ,IS necessary in using a pair of these nutsto have the same oppositely threaded. Cross grooves 7 are formed uponthe inner faces of the nuts and these cross grooves extend tion, one ofthe same is first the threaded end 3 of the parallel with the outer sidefaces of the nut so' as to intersect each other as clearly shown inFig.4;. In order to lock the nuts in posipositioned upon bolt 1 until itcomes into engagement with the supports 8. The key 9 is then positionedin one of the grooves '7 at which time the'other nut is threaded intoengagement with the bolt. Since these nuts are oppositely threaded, theywill of course be rotated in opposite directions to be positioneduponthe bolt 1. When the last-mentioned nut is threaded until the sameabuts against the first nut,

the'key 9 will be positioned within one of the grooves of each nut.

By referring to Fig. 2 it will be seen that this key comprises astraight body portion having the ends 10 bent to extend at right anglesthereto to form lips. When the nuts are threaded upon the bolts so as tocome into engagement with each other, the angular ends or lips 10 of thekey will extend out toward the side faces of the nuts as clearly shownin dotted lines in Fig. 1. At this time, the key may be swung by meansof one of the lips 10 to the position disclosed in dotted lines in Fig.3 and in full lines in Figs; 1 and 2. This action will force the outernut away from the inner nut as shown in Fig. 3, for a slight distance soas to positively bind upon the threadsfi of the bolt 1. This action isaccomplished by the curved portion 11 formed by the bending of theangular ends of lips 10. These curved portions 11 bear upon the edges 12of one of the nuts adjacent the end portions of one of the grooves 7. Asthese curved portions 11 ride upon the edges 12, it will be necessaryfor the key body 9 to moveslightly from the nut over which the angularends or lips 10 are being swung in order to provide an additional spacefor the breadth or width of the nut. It will be impossible toaccommodate this width of the nut upon the curved portions '11 owing tothe fact that these curved portions are formed so as tocommunicate withthe body of the key and that their inner portions. are considerablysmaller as clearly shown in Fig. 2 than the breadth of the nut. As thekey 9 is forced away the lips or angular ends 10 will extendtransversely of one of the nuts while the body of the key will be movedfor a the groove of this particular nut. As this key 9 moves slightlyoutwardly, 1t will, of course, be bearing upon the remaining nut andwill thereby force the threads of the olt and consequently they.

will also hear fir upon the key. In this operation the key w' bepositively held 1n a set position while th uts will be.prevented fromaccidental disp cement, provided they were-accidentally str k so astorotate one of the same and the ke were not provided with the angularendsor ips.

By referring to Fig. 3 the speic'fic actlon of the lock nut is disclosedfirst in ll lines at which time the angular ends or lips 'extend to oneside of the nuts. so as to allow the nuts to come into engagement witheach other at which time the key is swung as shown in dotted lines inthis figure while the outer nut is forced slightly outwardly but.of-course only for a distance allowed by the threads. By this shiftingof the nuts apart, they will bind upon the right and left threadswhereby the several portions of the device will be efliciently locked inposition.

By referring to Fig. 5 it will be seen that the threads 3 of the bolt 1are adapted to carry the nuts 13 having grooves 14 formed therein whichare substantially elliptical incross section. The key used in connectionwith this form of the device comprises an elliptical body 15 upon whichthe usual angular ends may be formed as indicated at 16 in Fig. 5, indotted lines. This form of the structure is assembled similar to the preferred form thereof but it will bejseen that when the key is turned, itwill not only bind at the portions adjacent the angular ends 16 buttheir elliptical bodies will also assist in forcing the nuts apart andcausing the nuts to have a locking action upon the threads 3 of thebolt.

From the foregoing description it will be seen that a very simple andetlicient lock nut has been produced wherein the key is turned forforcing the nuts apart for a distance allowed by the threads of the boltwhereby the nuts will be positively locked on the bolt and will retainthe key in a locked position for preventing the several portions frombe- Copies of this patent may he obtained for coming loose and therebyaccidentally disengaging each other.

What I claim is Y 1. A look nut of the class described comprising abolthaving right and left threads,

a pair of nuts carried upon the threaded 0 portions of said bolts, saidnutsprovided with registering grooves, a key positioned within a pair ofsaid grooves, said key comprising a straight body having end formed.integral thereon and extending at right 5 angles thereto,said ends andbody having curved portions formed at their junctions whereby when saidkey is swung the curved portions will ride upon the edges of one of saidnuts adjacent the outer side faces therebe forced upon the remaining nutso as to forcethe same slightly outwardly into a positive bindingactionwith the threads of the bolt for retaining the nuts and the key intheir lockedpositions.

2. A look nut of the class described comprising a bolt having right andleft threads, a pair of nuts positioned upon said bolt and provided withregistering grooves, said grooves being substantially elliptical incross section, a key positioned within a pair of said grooves, said keyhaving an elliptical body in cross section, and terminating in,angularly extending ends, body resting snugly within said grooves: "whenthe nuts are threaded into engagement with each other, sald key beingadapted to be swung by means of said angular ends so as to spread thenuts apart whereby the nuts will bind upon the threaded portions of saidbolt for positively resisting any tendency of said nuts to accidentallyrotate upon said bolt, said ends binding .upon the outer side faces ofone of said nuts for holding the elliptical body of said key in a setposition thereby causing said nuts and said key to remain in a positivelocked engagement with each other. In testimony whereof I hereunto afiixmy signature 1n presence of two witnesses.

. HORACE W. JENNER.

Witnesses:

HENRY M. W'ILLIAMS, J. FRANK WHYTE.

five cents each, hy addressing the Commissioner of Patents, Washington,D. 0.

